Get the CPU set of logical processors that are physically close to device
cudevice. Return the CPU set describing the locality of the CUDA device
cudevice.

Topology topology and device cudevice must match the local
machine. I/O devices detection and the CUDA component are not needed in the
topology.

The function only returns the locality of the device. If more
information about the device is needed, OS objects should be used instead,
see hwloc_cuda_get_device_osdev() and
hwloc_cuda_get_device_osdev_by_index().

This function is currently only implemented in a meaningful way
for Linux; other systems will simply get a full cpuset.

Get the hwloc OS device object corresponding to CUDA device cudevice. Return
the hwloc OS device object that describes the given CUDA device cudevice.
Return NULL if there is none.

Topology topology and device cudevice must match the local
machine. I/O devices detection and the CUDA component must be enabled in the
topology. If not, the locality of the object may still be found using
hwloc_cuda_get_device_cpuset().

Note:

This function cannot work if PCI devices are filtered
out.

The corresponding hwloc PCI device may be found by looking at the
result parent pointer (unless PCI devices are filtered out).

Get the hwloc OS device object corresponding to the CUDA device whose index is
idx. Return the OS device object describing the CUDA device whose index is
idx. Return NULL if there is none.

The topology topology does not necessarily have to match the
current machine. For instance the topology may be an XML import of a remote
host. I/O devices detection and the CUDA component must be enabled in the
topology.

Note:

The corresponding PCI device object can be obtained by
looking at the OS device parent object (unless PCI devices are filtered out).

This function is identical to
hwloc_cudart_get_device_osdev_by_index().